1 export default function parse(input) {
2 input = input.toUpperCase();
3 var splitIndex = input.indexOf("P");
4 var mantissa, exponent;
6 if (splitIndex !== -1) {
7 mantissa = input.substring(0, splitIndex);
8 exponent = parseInt(input.substring(splitIndex + 1));
14 var dotIndex = mantissa.indexOf(".");
16 if (dotIndex !== -1) {
17 var integerPart = parseInt(mantissa.substring(0, dotIndex), 16);
18 var sign = Math.sign(integerPart);
19 integerPart = sign * integerPart;
20 var fractionLength = mantissa.length - dotIndex - 1;
21 var fractionalPart = parseInt(mantissa.substring(dotIndex + 1), 16);
22 var fraction = fractionLength > 0 ? fractionalPart / Math.pow(16, fractionLength) : 0;
28 if (Object.is(sign, -0)) {
35 mantissa = sign * (integerPart + fraction);
38 mantissa = parseInt(mantissa, 16);
41 return mantissa * (splitIndex !== -1 ? Math.pow(2, exponent) : 1);